Grader and scraper



No. 609,679. Patented Aug. 23, |999.

C. KARRAKER.

GRADER AND SCRAPEB.

(Application Bled June 21` 1897.) (No Model.) 3 Sheets$heet 2.

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Patented Aug. 23, |898.

C. KARRAKER.

GRADER AND SCRAPER.

(Application filed June 21, 1897.)

3 Sheets-Sheet 3.

(No Model.)

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IJNTTED STATES PATENT OFFICE.

CALVINYKARRAKER, OF DON GOLA, ILLINOIS.

G RADER AND SCRAPER.

SPECIFICATION forming part of Letters Patent No. 609,679, dated August 28, 1898. Application filed J'une 21, 1897. Serial No. -641,682. (No model.)

To a/ZZ whom t may concern:

Be it known that I, CALVIN KARRAKER, of Dongola, in the county of Union and State of Illinois, have invented new and useful Improvements in Graders and Scrapers, of which the following is a full, clear, and exact description.

This invention relates to machines for grading roads, banks, and the like and also for excavating ditches; and the object is to provide a machine of this character with comparativelxr few parts, that will reduce the amount of labor required in grading or eX- cavating, thereby lessening the cost of such work; and a further object is to so construct the machine that it may be adj usted to dierent widths of road.

I will describe a grader and scraper embodying myinvention and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a side elevation of a grader and ditcher embodying my invention, but showing the same attached to a traction-engine. Fig. 2 is a rear elevation and partial section of the machine. Fig. 3 is a top plan view with portions broken away to more clearly show other parts. Fig. 4. is a sect-ional detail showing a portion of the adjustable graderframe employed. Fig. 5 is a side elevation thereof. Fig. 6 is an inside elevation of a portion of one of the grader-frames. Fig. 7 is a section thereof. Fig. 8 is a perspective view showing a scraper employed in the grader-frame, and Fig. 9 is a perspective View showing the plow-teeth employed.

The machine comprises a carriage or frame consisting of uprights 1, connected at the top by cross-bars 2 3 and supported on casters 1. These casters 4.- have their journal-bearings in yoke-frames 5, swiveled on threaded rods 6, extended upward through openings in the lower ends of the uprights 1. By the swiveled construction it is obvious that the mascrew-rods willbe held as adjusted by means of jam-nuts 7 and 8.

From the rear side of the main frame a V- shaped push-bar 9 extends rearward to a connection with a bracket secured to the front of the boiler 10 of the traction-engine. This push-bar will have pivotal connection with the frame in such manner that said frame may have a slight vertical swinging motion, and it will be so pivoted to the bracket on the boiler 10 that the machine may turn laterally with relation to the engine.

Mounted to swing vertically at opposite sides of the frame of the machine are graderframes 11. The inner ends of these graderframes are mounted to swing on shafts having bearings in the frame portions 1, and in the outer end of each frame is journaled a shaft 12, and in the inner end of each frame is journaled a shaft 15. The outer shaft 12 is provided with outer sprocket-wheels 13 and a central sprocket-wheel 14:. The inner shaft 15 is provided with outer sprocket-wheels 16 and a central sprocket-wheel 17. Sprocketchains 18, 19, and 2O extend around opposite sprocket-wheels, and rigidly attached to the sprocket-chains are scraperplates 21 and teeth or point-carrying bars 22. The inner surfaces of the side portions of the frames 11 will be provided at the lower ed ge and around the outer end with guide-fianges 23, designed to prevent the sagging of the chains. The Scrapers 21 have horizontally-disposed portions designed to be secured to the sprocketchains and vertically-disposed portions designed to scrape away the dirt after the same shall have been loosened by the points 24 on the bars 22. The scraping portions of the Scrapers have their ends extended somewhat over the sides of the supporting-frame, and in order to clear the guide-strips 23 the said ends of the Scrapers at the portion nearest the outer chains will be cut away, as shown at 25.

It will be noted that two point-supporting bars alternate with a pair of Scrapers-that is, between each pair of Scrapers two pointcarrying bars will be arranged. By this construction as the device is rotated the ground will be thoroughly cut up or loosened, so that it may be scraped away by the Scrapers.

I will now describe a means for rotating the sprocket -chains carrying the Scrapers and point-carrying bars.

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From the sprocket-wheel 26, meshing with driving-gear operated by the traction-engine, a sprocket-chain 27 extends to a sprocket- -Wheel 28 on a counter-shaft 29,having journalbearings in the frame of the grader. The tension of the chain 27 may be regulated by a swinging idler 27a. The shaft 29 has mitergear 30 31, meshing, respectively, with mitergear 32 and 33 on the inner shafts 15, operating the scraper-carrying chains.

Preferably the frame `portions 11 will be made longitudinally adjustable, so that the machine may be adjusted to different widths of road or to heights of banks or the like. As here shown, each portion 1l of the frame consists of two sections 34 and 35. The portion 35 has a longitudinal slot through which a bolt 36, extended from the portion 34, projects, and the portion 34 at its inner end will be provided with a suitable loop to engage over the portion 35. The two portions 34`and 35 may be moved longitudinally with relation to each other by means of a pivoted segmentgear 37 engaging with a rack 38 on the frame portion 35. Of course when any longitudinal adjustment is made the chains must be lengthened or shortened accordingly by taking out links or adding links.

, A cross-bar 39 extends across the machineframe. As here shown, it is supported on risers 40, 41, 42, and 43. Journaled in the out-er ends of this cross-bar 39 are pulleys 44 45, over which lift-ing ropes or chains 46 extend to cross-bars 47 on the outer ends of the frame portions 11.4 The inner ends of the two lifting ropes or chains 46 are attached to a rope or chain 48, which extends to a connection with a piston-rod 48a, the piston of which operates in an auxiliary steam-cylinder 48h. This connection is used, however, only in certain kinds of work where it is necessary to give a fast up-and-down motion to the wings. The frame portions 11 will be laterally braced by diagonally-disposed bracebars 49 and 50. The outer ends of converging bars will be engaged upon the shafts 12 or 15, and one bar on each side of the frame will be.provided with a slot through which the bolt 36 may pass.

Pivoted to the upright 40 is the latch 51, adapted to engage with the cross-bar 47 of the frame l1 immediately below the latch to hold the frame in an upright position or out of its operating position. The other frame will be supported by a similar latch 52, as indicated by dotted lines.

It is obvious that the frames carrying the Scrapers and point-supporting bars may be raised to any desired inclination and operated on very steep banks, where horses or other animals could not work.

The machine will be comparatively light, so that it may be easily pushed along by a traction-engine. I do not,however, coniine my invention to its connection with a traction-engine, as horses or other animals might be employed to draw it along, although a traction-engine might be preferable.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A ditcher and grader comprising a carriage, a frame mounted to swing vertically with relation to the carriage and consisting of side sections, each consisting of two parts adjustable longitudinally, one part on the other, shafts at the ends of the frame, wheels on the outer ends of each shaft, vbraces extended from the shafts to the side pieces of the frame, the said braces being slotted at their inner ends, a bolt extended through the slots of the overlapped inner ends of pairs of braces, ground-breaking devices operated by the wheels, means for imparting motion to the wheels and means for vertically moving the frame, substantially as specified.

2. A ditcher and grader,.comprising a carriage, a frame mounted to swing. vertically on the carriage, and consisting of side sections, each consisting of two sections adjustable longitudinally,one section on the other, shafts at the ends of the frame, sprocket-wheels on the outer ends of each shaft, a sprocket-wheel at the center of each shaft, braces engaging with the shafts at the sides of the center sprocket-wheels and extending to the side pieces of the frame, the said braces being slotted at their inner ends, a bolt extending. through the slots of the overlapped inner ends of pairs of braces, sprocket-chains engaging with the sprocket-wheels, groundbreaking devices carried by the chains, means for imparting motion to the sprocket-wheels and means for vertically moving the frame, substantially as specified.

3. Aditcher and grader, comprising a carriage, frames mounted to swing on opposite sides of the carriage, ground-breaking devices movable around said frames, an engine and connections between said frames and a piston-rod of the engine, substantially as specied. l

CALVIN KARRAKER. Witnesses:

WILL R. HUGHES, W. L. MCLANE.

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